HF CB antenna SIRIO FLEX-LOG series FLEX-LOG 3 / FLEX-LOG 4, without cable

The FLEX-LOG series includes two high-efficiency CB antennas — FLEX-LOG 3 and FLEX-LOG 4 — designed with a logarithmic loading system for improved broadband performance. Both models offer omnidirectional radiation with vertical linear polarization, ideal for mobile use on the 27 MHz CB band. Thanks to their 3/8" threaded base, they are compatible with a wide range of mounts and accessories. Customers can select the model that best suits their installation and power requirements.

Technical Specifications
Product Name	FLEX-LOG 3 / FLEX-LOG 4
Product Numbers	2407915.03 (FLEX-LOG 3) / 2408015.03 (FLEX-LOG 4)
Type	Logarithmic loaded
Radiation	Omnidirectional
Polarization	Linear vertical
Frequency Range	26.9 – 27.5 MHz (Tunable)
Supported Systems	CB 27 MHz
Bandwidth	≥ 600 kHz (FLEX-LOG 3) / ≥ 1 MHz (FLEX-LOG 4) @ SWR ≤ 2
Max Power	100W / 300W (FLEX-LOG 3) — 250W / 750W (FLEX-LOG 4)
Connector	3/8" Thread
Materials	Copper, Chromed Brass, Fiberglass
Height (approx.)	900 mm (FLEX-LOG 3) / 1260 mm (FLEX-LOG 4)
Weight (approx.)	135 g (FLEX-LOG 3) / 175 g (FLEX-LOG 4)
Mount Type	3/8" Threaded base
Suitable Accessories	CB-HDS adapter 3/8"-24 female to UHF-female (SO-239) (P/N: 2508106.00)